COMPANY NEWS;TESORO REACHES AN ACCORD WITH DISSIDENT INVESTORS

The Tesoro Petroleum Corporation said yesterday that it had reached an agreement with a shareholder group that has tried to remove the company's board for the last two years. The group, the Committee for New Management, agreed not to seek control of the l company or support any outside candidates for its board until 1999. Tesoro, an oil company based in San Antonio, will add three directors to its board, increasing membership to nine. Sanford B. Prater, a partner in the company's largest shareholder, Ardsley Advisory Partners, and Dr. Alan Kaufman, a member of the shareholders group, will join the board. Tesoro's governance committee will select a third member who now has no connection to the company, the shareholders' group or Ardsley.